Table of Contents

Angles

Entering Angles

Angles are their own object type. An angle is entered by prefixing a number with the angle symbol (∡, shortcut AL-RS-6), followed by a number, then finally a suffix that indicates the system (° = degrees1), r = radians, g = grads, or d = DMS [DDD.MMSS, where DDD=degrees, MM=minutes, SS=seconds])2). To enter an angle in the current angle mode of the calculator, the suffix can be left off. For example, the following all indicate an angle of 90.5 degrees:

∡90.5°

∡1.5795.r

∡100.5556g

∡90.3000d

and

∡90.5 with the angle mode set to degrees.

Working with Angles

Trigonometric functions operate on angle objects as expected:

∡45° SIN yields the real number result 0.7071.

Basic arithmetic operations can also be applied to angle objects:

∡90° ∡50° + yields ∡135°

∡1.57r ∡50° - yields ∡0.6973r

∡90° ∡45° * yields 4050

∡90° ∡45° / yields 2

The result of an operation on angle objects has the following conventions:

Addition and subtraction between angles returns an angle expressed in the system of the first argument,

For all other operations, angles will be converted to the current angle mode and output a number.